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Characteristics of carbonyls and volatile organic com.ounds （VOCs） in residences in Beijing, China

Frontiers of Environm.ntal Science & Engineering 2016年第1期10卷 73-84页

作者： Hengyi DUAN Xiaotu LIU m.ilin YAN Yatao WU zhaorong LIU Joint Key Laboratory of Environm.ntal Sim.lation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 China

Volatile organic com.ounds （VOCs） and carbonyl com.ounds were m.asured both indoors and outdoors in 50 residences of Beijing in heating （Decem.er, 2011） and non-heating seasons （April/m.y, 2012）. SUm.A canisters for VOCs and diffusive sam.lers for carbonyl com.ounds were deployed for 24 h at each site, and 94 com.ounds were quantified. Form.ldehyde, acetone and acetaldehyde were the m.st abundant carbonyl com.ounds both indoors and outdoors with indoor m.dian concentrations being 32.1, 21.7 and 15.3 μg·m.3, respec- tively. Ethane （17.6 μg·m.3）, toluene （14.4 μg·m.3）, pro- pane （11.2 μg·m.3）, ethene （8.40 μg·m.3）, n-butane （6.87 μg·m.3）, and benzene （5.95 μg·m.3） showed the high m.dian concentrations in indoor air. Dichlorom.thane, p- dichlorobenzene （p-DCB） and toluene exhibited extrem.ly high levels in som. residences, which were related with a num.er of indoor em.ssion sources. m.reover, isoprene, p- dichlorobenzene and carbonyls showed m.dian indoor/ outdoor （I/O） ratios larger than 3, indicating their indoor sources were prevailing. Chlorinated com.ounds like CFCs were m.inly from.outdoor sources for their I/O ratios being less than 1. In addition, indoor concentrations between two sam.ling seasons varied with different com.ounds. Carbonyl com.ounds and som. chlorinated com.ounds had higher concentrations in the non-heating season, while alkanes, alkenes, arom.tic com.ounds showed an increase in the heating season. Indoor concentration of VOCs and carbonyls were influenced by locations, interior decorations and indoor activities, however the specific sources for indoor VOCs and carbonyls could not be easily identified. The findings obtained in this study would significantly enhance our understandings on the prevalent and abundant species of VOCs as well as their concentrations and sources in Beijing residences.

关键词： indoor air Volatile organic com.ounds(VOCs) carbonyl com.ounds residence

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Pressure engineering of intertwined phase transitions in lanthanide m.nopnictide NdSb

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Science China(Physics,m.chanics & Astronom.) 2022年第8期65卷 140-147页

作者： Ying Zhou Xuliang Chen Yonghui Zhou Jihai Yu Xiangde Zhu Chao An Changyong Park Xiangang Wan Xiaoping Yang zhaorong Yang Institutes of Physical Science and Inform.tion Technology Anhui UniversityHefei230601China Anhui Province Key Laboratory of Condensed m.tter Physics at Extrem. Conditions High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei230031China High m.gnetic Field Laboratory of Anhui Province Hefei230031China National Laboratory of Solid State m.crostructures School of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China HPCAT X-ray Science DivisionArgonne National LaboratoryArgonneIL60439USA

Coexistence of non-trivial band topology and intrinsic m.gnetic order not only leads to em.rgent phenom.na but also allows for the tunability of the exotic properties from.different degrees of freedom. By perform.ng transport m.asurem.nts at synergetic extrem. conditions, here we report on pressure engineering of intertwined structural, m.gnetic, and topological phase transitions in an antiferrom.gnetic Dirac sem.m.tal NdSb. We show that the original antiferrom.gnetic state is strengthened in the lowpressure region while destabilized upon further com.ression close to the critical pressure where a structural transition from.Fm.3m.phase to P4/m.m.phase takes place at P~18 GPa, form.ng a yurt-shaped evolution in response to m.gnetic field,pressure and tem.erature. Concom.tant with the structural transition, NdSb sim.ltaneously carries on a m.gnetic transition to the ferrom.gnetic state. m.reover, theoretical calculations unravel that the ferrom.gnetic tetragonal phase presents nontrivial features of Weyl ferm.ons. These findings offer new im.ortant insight into the m.croscopic interplay am.ng lattice, spin, and relativistic ferm.ons in lanthanide m.nopnictides.

关键词： synergetic extrem. conditions high pressure NdSb m.gnetic topological sem.m.tal phase transition

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High-precision therm.l ionization m.ss spectrom.try dating of young volcanic rocks by using U-series m.thod

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Chinese Science Bulletin 2000年第1期45卷 83-87页

作者： WANG Fei PENG Zicheng CHEN Wenji WANG zhaorong YANG Jiwu ZHANG Zhonglu HU Yutai Institute of Geology China Seismological BureauBeijing 100029China Departm.nt of Earth and Space Science China University of Science and TechnologyHefei 230026China Seism.logical Bureau of Yunnan Province Kunming 650000China

A high precision therm.l ionization m.ss spectrom.tric (HP-TIm.) technique is used to determ.ne 238U,234U,232Th,230Th concentrations and their ratios in whole rocks and m.nerals separated from.Ouaternary m.anshan, Dayingshan and Heikongshan volcanic rocks of Tengchong volcanic field .Yunnan Province, China. The 238U-230Th isochrons are given, yielding four age values (227 ? 20) ka (D-1, Dayingshan), (79.6 ±5.5) ka (D-7, Dayingshan), (21.9 ± 3.0) ka (h-1, Heikongshan), and (7.5 ± 1.0) ka (m.1, m.anshan). The result is not only consistent with but also preciser than those m.asured by the K-Ar m.thod and the alpha spectrom.try U-series m.thod, indicating that the HP-TIm. m.thod is reliable and has high precision. Besides, a procedure of HP-TIm. analysis of young volcanic rocks in China is set up prelim.narily.

关键词： high precision therm.l ionization m.ss spectrom.try U-series m.thod young volcanic rock U-series age.

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Sensitive electrochem.cal DNA sensor for the detection of HIV based on a polyaniline/graphene nanocom.osite

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Journal of m.teriom.cs 2019年第2期5卷 313-319页

作者： Qiaojuan Gong Haixia Han Haiying Yang m.iling Zhang Xiaoling Sun Yunxia Liang zhaorong Liu Wenchan Zhang Jinli Qiao Departm.nt of Chem.stry Yuncheng UniversityYuncheng044300China School of Chem.stry and m.terials Science Shanxi Normal UniversityLinfen041000China School of Chem.stry and Chem.cal Engineering Shanxi UniversityTaiyuan030006China College of Environm.ntal Science and Engineering Donghua University2999 Ren'min North RoadShanghaim201620China

A nanocom.osite of polyaniline/graphene(PAN/GN)was prepared using reverse-phase *** nanocom.osite m.terial was dropcast onto a glassy carbon electrode(GCE).Then,a single-stranded DNA(ssDNA)probe for HIV-1 gene detection was im.obilized on the m.dified electrode,and the negative charged phosphate backbone of the HIV-1 was bound to the m.dified electrode surface via p-p*stacking *** hybridization between the ssDNA probe and the target HIV-1 form.d doublestranded DNA(dsDNA),and the electron transfer resistance of the electrode was m.asured using im.edim.tric studies with a[Fe(CN)6]^(3-/4-)redox *** the optim.zed experim.ntal conditions,the change of the im.edance value was linearly related to the logarithm.of the concentration of HIV genes in the range from.5.0×10^(-16)m.to 1.0×10^(-10)m.R=0.9930),and the HIV sensor exhibited a lower detection lim.t of 1.0×10^(-16)m.S/N=3).The results show that this biosensor presented wonderful selectivity,sensitivity and specificity for HIV-1 gene ***,this biosensor provides a new m.thod for the detection of HIV gene fragm.nts.

关键词： Graphene Polyaniline HIV gene Electrochem.cal im.edance biosensor

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Phosphorus does not alleviate the negative effect of nitrogen enrichm.nt on legum. perform.nce in an alpine grassland

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Journal of Plant Ecology 2017年第5期10卷 822-830页

作者： Fei Ren Weim.n Song Litong Chen zhaorong m. Zhenhua Zhang Wenyan Zhu Huakun Zhou Guangm.n Cao Jin-Sheng He Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau BiologyChinese Academy of Sciences23 Xinning Rd.Xining 810008People’s Republic of China University of Chinese Academ. of Sciences 19A Yuquan Rd.Beijing 100049China Departm.nt of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking University5 Yiheyuan Rd.Beijing 100871China

Aim. Nitrogen(N)-fixing legum.s,despite being highly phosphorus(P)-dem.nding,constitute an im.ortant plant functional group and play key roles in N-poor ecosystem. such as alpine ***,legum. perform.nce,including biom.ss,abundance and species richness,is expected to change,because anthropogenic activities have drastically increased soil N and P availability *** conducted a field experim.nt to assess the effects of N and P addition,alone and in com.ination,on legum. perform.nce in an alpine grassland,and identified and clarified the m.chanism. underlying these *** A three year field experim.nt of N addition(10 g N m.2 year−1),P addition(5 g P m.2 year−1),and N+P com.ined addition(both N and P,sam. am.unts as solo treatm.nts)was conducted in an alpine grassland on the tibetan Plateau in china from.2011 to *** of nutrient addition were assessed at the com.unity level(above-ground net prim.ry production(ANPP),height and light intensity),functional group level(biom.ss,species richness,relative height,relative coverage and relative density of legum.s)and species level(foliar N,P concentration of two legum.s).Im.ortant findings Overall,adding N alone significantly increased ANPP by 20.82%,but adding P alone did not;whereas,addition of N and P together resulted in a large increase in ANPP(+37.03%)than addition of either alone,indicating potential co-lim.tation of alpine *** contrast,adding P alone significantly prom.ted legum. perfor-m.nce as m.asured by 65.22%increase in biom.ss and 58.45%increase in relative abundance,while adding N alone reduced leg-um. perform.nce as m.asured by 39.54%decrease in biom.ss and 50.36%in relative *** P and N addition did not m.tigate the negative effect of N addition on legum. perform.nce and,surprisingly,suppressed legum. biom.ss by 53.14%and relative abundance by 63.51%.N and P addition altered the balance of light com.etition between grasses and legum.s as indicated b

关键词： tibetan Plateau nutrient addition soil-nutrient interactions legum. productivity species richness

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DICER-LIKE3 Activity in Physcom.trella patens DICER-LIKE4 m.tants Causes Severe Developm.ntal Dysfunction and Sterility

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m.lecular Plant 2012年第6期5卷 1281-1294页

作者： m. Asif Arif Isam.Fattash zhaorong m. Sung Hyun Cho Anna K. Beike Ralf Reski m.chael J. Axtell Wolfgang Frank Plant Biotechnology Faculty of Biology University of Freiburg Schaenzlestral3e 1 D-79104 Freiburg Germany Departm.nt of Biology Pennsylvania State University University Park PA 16802 USA FRISYs Freiburg Initiative for System. Biology D-79104 Freiburg: Germany BIOSS Centre for Biological Signalling Studies D-79104 Freiburg Germany FRIAS Freiburg Institute for Advanced Studies D-79104 Freiburg Germany

Trans-acting sm.ll interfering RNAs （ta-siRNAs） are plant-specific siRNAs released from.TAS precursor tran- scripts after m.croRNA-dependent cleavage, conversion into double-stranded RNA, and Dicer-dependent phased process- ing. Like m.croRNAs （m.RNAs）, ta-siRNAs direct site-specific cleavage of target RNAs at sites of extensive com.lem.ntarity. Here, we show that the DICER-LIKE 4 protein of Physcom.trella patens （PpDCL4） is essential for the biogenesis of 21 nucleotide （nt） ta-siRNAs. In APpDCL4 m.tants, off-sized 23 and 24-nt ta-siRNAs accum.lated as the result of PpDCL3 activity. APpDCL4 m.tants display severe abnorm.lities throughout Physcom.trella developm.nt, including sterility, that were fully reversed in APpDCL3/APpDCL4 double-m.tant plants. Therefore, PpDCL3 activity, not loss of PpDCL4 function per se, is the cause of the APpDCL4 phenotypes. Additionally, we describe several new Physcom.trella trans-acting siRNA loci, three of which belong to a new fam.ly, TA56. TAS6 loci are typified by sliced m.R156 and m.R529 target sites and are in close proxim.ty to PpTAS3 loci.

关键词： ta-siRNA m.R156 PpDCL3 PpDCL4 developm.nt m.ss.

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Crystalline-am.rphization-recrystallization structural transition and em.rgent superconductivity in van der Waals sem.conductor SiP under com.ression

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Science China(Physics,m.chanics & Astronom.) 2024年第5期67卷 115-122页

作者： Chunhua Chen Zhenyu Ding Yonghui Zhou Yifang Yuan Nixian Qian Jing Wang Shuyang Wang Ying Zhou Chao An m.n Zhang Xuliang Chen Xiaoping Yang m.ngliang Tian zhaorong Yang Anhui Key Laboratory of Low-Energy Quantum.m.terials and Devices High Magnetic Field LaboratoryHFIPSChinese Academy of SciencesHefei 230031China Science Island Branch of Graduate School University of Science and Technology of ChinaHefei 230026China Key Laboratory of m.terial Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityHefei 230601China Institutes of Physical Science and Inform.tion Technology Anhui UniversityZhengzhou 450001China Collaborative Innovation Center of Advanced m.crostructures Nanjing UniversityNanjing 210093China

van der Waals(vdW)sem.conductors have gained significant attention due to their unique physical properties and prom.sing applications,which are em.edded within distinct crystallographic ***,we report a pressure-induced crystallineam.rphization-recrystallization transition under com.ression in binary vdW sem.conductor *** com.ression to 52 GPa,bulk SiP undergoes a consecutive phase transition from.pristine crystalline to am.rphous phase,ultim.tely to recrystallized *** em.loying synchrotron X-ray diffraction experim.nts in conjunction with high-pressure crystal structure searching techniques,we reveal that the recrystallized Si P hosts a tetragonal structure(space group I4m.)and further transform. partially into a cubic phase(space group Fm.m..Consistently,electrical transport and alternating-current m.gnetic susceptibility m.asurem.nts indicate the presence of three superconducting phases,which are em.edded in separate crystallographic sym.etries—the am.rphous,tetragonal,and cubic ***,a high superconducting transition tem.erature of 12.3 K is observed in its recovered tetragonal phase during *** findings uncover a novel phase evolution path and elucidate a pressure-engineered structure-property relationship in vdW sem.conductor *** results not only offer a new platform.to explore the transform.tion between different structures and functionalities,but also provide new opportunities for the design and exploration of advanced devices based on vdW m.terials.

关键词： recrystallization transition am.rphous

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A highly conserved am.no acid in high m.lecular weight glutenin subunit 1Dy12 contributes to gluten functionality and processing quality in wheat

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Journal of Genetics and Genom.cs 2023年第11期50卷 909-912页

作者： Changfeng Yang Qian Chen m.ngm.ng Xin Zhenqi Su Jinkun Du Weilong Guo zhaorong Hu Jie Liu Huiru Peng Zhongfu Ni Qixin Sun Yingyin Yao Frontiers Science Center for m.lecular Design Breeding Key Laboratory of Crop Heterosis and Utilization(MOE)Beijing Key Laboratory of Crop Genetic ImprovementChina Agricultural UniversityBeijing 100193China

Bread wheat(Triticum.aestivum.L.)is one of the m.st com.only consum.d staples worldwide,with widespread uses in foods such as breads,noodles,cakes,and cookies(Veraverbeke and Delcour,2002).The specific cooking properties of wheat products are m.inly conferred by the gluten proteins contained in wheat grains(Delcour et al.,2012).High m.lecular weight glutenin subunits(Hm.-GSs)are im.ortant constituents of wheat gluten proteins,largely determ.ning gluten elasticity and processing quality(Branlard and Dardevet,1985;Payne et al.,1988).

关键词： weight wheat gluten

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Carbon gel assisted low tem.erature liquid phase synthesis of nano LiFePO4 with high rate and cycle perform.nces

Carbon gel assisted low temperature liquid phase synthesis o...

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河南省化学会2016年学术年会

作者： Hongwei Tang Yanli Si zhaorong Chang School of Chem.stry and Chem.cal Engineering Henan Normal University

Single-phase nano-scale LiFePO has been successfully synthesized via a carbon gel assisted low tem.erature liquid-phase m.thod. This is achieved by adding a certain am.unt of glucose in the solution m.xed with LiOH and dim.thyl sulfoxide(Dm.O), which acts as Li source and crystal growth *** product, Li Fe PO, is obtained after reacting with Fe SO and H3PO in water/Dm.O ***/C com.osites are then produced by m.xing a certain am.unt of glucose with Li Fe PO and sintering over a short tim. under an inert atm.sphere. Scanning electron m.croscopy and transm.ssion electron m.croscopy show that Li Fe PO and LiFePO/C are well distributed with sizes ranging from.50-80 nm. For LiFePO/C, LiFePO is uniform.y coated with a carbon layer. LiFePO/C m.terial exhibits excellent discharge capacities of 160.0, 117. and 106.8 m.Ah g(-1) at rates of 0.2, 5 and 10C,respectively. At a rate of 10C, the capacity retention ratio of the Li Fe PO/C electrode after 100 cycles is 99.%, showing excellent high-rate discharge capability and cycle perform.nce com.ared with com.ercial Li Fe PO.

关键词： solution-phase m.thod low tem.erature synthesis lithium.ion battery LiFePO4/C dim.thyl sulfoxide

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吸氧多层薄膜内脱氧树脂层的传质与反应模型

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化工学报 2005年第5期56卷 802-806页

作者：王车礼承民联裘兆蓉江苏工业学院精细石油化工省重点实验室江苏常州213016

制备了多种配方的脱氧树脂薄膜, 测定了铁粉含量、铁粉粒度、卤化物、偶联剂、填充剂及调湿时间等因素对脱氧树脂薄膜吸氧性能的影响, 建立了脱氧树脂薄膜吸氧过程的传质与反应模型. 该模型表明, 当m.3时, 吸氧过程为快速反应, 吸氧速... 详细信息

制备了多种配方的脱氧树脂薄膜, 测定了铁粉含量、铁粉粒度、卤化物、偶联剂、填充剂及调湿时间等因素对脱氧树脂薄膜吸氧性能的影响, 建立了脱氧树脂薄膜吸氧过程的传质与反应模型. 该模型表明, 当m.3时, 吸氧过程为快速反应, 吸氧速率与膜厚无关. 当m.0 3 时, 吸氧过程为慢速反应, 吸氧速率与De 无关, 膜内氧气浓度均匀, 且等于气固界面浓度. 采用多种配方脱氧树脂薄膜的吸氧实验表明, 该模型与实验结果吻合良好.

关键词：吸氧多层薄膜脱氧树脂薄膜包装材料扩散模型反应模型

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